DispatchObject Class
Definition
Important
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Base class for dispatch objects.
public abstract class DispatchObject : IDisposable, ObjCRuntime.INativeObjecttype DispatchObject = class
interface INativeObject
interface IDisposable- Inheritance
-
DispatchObject
- Inheritance
- Derived
- Implements
Remarks
Dispatch objects share functions for coordinating memory management, suspension, cancellation and con- text pointers. While all dispatch objects are retainable, not all objects support suspension, context pointers or finalizers (currently only queues and sources support these additional interfaces).
The invocation of blocks on dispatch queues or dispatch sources may be suspended or resumed with the methods M:CoreFoundation.DispatchObject.Suspend() and M:CoreFoundation.DispatchObject.Resume() respectively. The dispatch framework always checks the suspension status before executing a block, but such changes never affect a block during execution (non-preemptive). Therefore the suspension of an object is asynchronous, unless it is performed from the context of the target queue for the given object. The result of suspending or resuming an object that is not a dispatch queue or a dispatch source is undefined.
Important: suspension applies to all aspects of the dispatch object life cycle, including the finalizer function and cancellation handler. Therefore it is important to balance calls to M:CoreFoundation.DispatchObject.Suspend() and M:CoreFoundation.DispatchObject.Resume() such that the dispatch object is fully resumed when the last reference is released. The result of releasing all references to a dispatch object while in a suspended state is undefined.
Dispatch queues and sources support supplemental context pointers. The value of the context point may be retrieved and updated with the P:CoreFoundation.DispatchObject.Context property.
The result of getting or setting the context of an object that is not a dispatch queue or a dispatch source is undefined.
Properties
| Handle | |
| Handle | (Inherited from NativeObject) |
Methods
| Activate() | |
| Check() | |
| Dispose() | |
| Dispose() | (Inherited from NativeObject) |
| Dispose(Boolean) | |
| Dispose(Boolean) | (Inherited from NativeObject) |
| Equals(Object) | |
| Finalize() | |
| GetHashCode() |
Returns the hashcode for this object |
| InitializeHandle(IntPtr) | (Inherited from NativeObject) |
| Release() | |
| Retain() | |
| SetTargetQueue(DispatchQueue) | |
Operators
| Equality(DispatchObject, DispatchObject) | |
| Inequality(DispatchObject, DispatchObject) |